Pencil-sharpener.



STATES PATENT oEEIo nELBERT o. RUSH, or DULUTH, MINNESOTA.

PENCIL-SHAFVISPENER.

Patented Nov. 27, 1906.

Application filed April 4,1905. Serial No. 253,749.

To all whom it may concern:

Be it known that I, DELBERT D. RUSH, a citizen of the United States,residing at Duluth, in the county of St. Louis and State of Minnesota,have invented certain new and useful Improvements in Pencil-Sharpeners;and I do hereby declare the following to be a full, clear, and exactdescri tion of the invention, such as will enable ot' ers skilled in theart to-which it appertains to make and use the same.

My invention relates to pencil-Sharpeners, and has for its object theprovision of a rotary sharpener adapted to be operated by a motor.

It has for a further object the provision of a sharpening-cone which maybe easily opened to discharge broken leads or other refuse.

therefrom.

It has for a further object the provision of motor-governin means adated to be 0 eraatedby a' pencil when sai pencil is t ust into thesharpening-cone.

With these and other objects in view it con sists of a motor, .asharpening-cone mounted on said motor, means for driving said motor, andgoverning means adapted to control the supp y of power to said motor.

It also consists of certain other constructions, combinations, andarrangements of parts hereinafter described and claimed.

In the drawings, Figure 1 is a vertical transverse central section,partly in diagram, through my said invention. Fig. 2 is a perspectiveview, partly broken away, of a portlon of the motor-shaft and of thehead and sharpening-cone mounted thereon. Fi 3 is a horizontal sectionof said head ands arpening-cone on the line ab of Fig. 1, omitting theparts below the line 0. -d of said Fig. 1.

In said drawings, 1 is a casing or box having the lid 2 hinged theretoin any suitable manner, as at 2 Said box is horizontally divided into anupper and lower com artment A and B, respectively, by a partition as 3.Said upper compartment is divide into two compartments A and G,respectively, by a shelving-partition 4, having the vertical extension4. A drawer 5 is inserted through the wall of said box into the com- C,is a motor 7 of any suitable construction and driven by any suitablepower derived from any suitable source; but 1 preferably use an electricmotor. Said motor is provided with a rotary shaft 7 which is projectedthrough said partition 3 and preferably through the compartment C andthe partition 4 and is provided at its -u per end with a head or holder8, secured t ereto in any suitable manner. Said head is eccentricallyrecessed in its upper end, as at 8, said recess connecting with aneccentric aperture penetrating the lower face of said head, as at 8.Positioned within said recess and extending above said head and axiallyalined with said shaft is a hollow, split, or longitudinally-dividedrotary sharpening-cone comprising the parts 9 and 10, respectively. Saidpart 9 is rigidly secured to said head in any suitable manner, as by thescrews 9, extending through the side of said head and into the wall ofsaid cone. The opposite part 10 of said cone is pivoted at its upperend, as at 10*, to a suitable stanchion or post '11, erected on orformin art of-said head. A finger-hold 10 is forme upon said member 10for the purpose of opening said member against the action of the spring12 to permit dust or broken points to esca e from said cone through theaperture 8*. ithin said recess is secured a spring 12, adaptedto bearagainst the side of said part 10 and hold said cart in operativeposition against said part 9.

he tension of said spring may be adjusted by a set-screw 13, projectedthrough the wall of said head and bearing against the spring,intermediate of the ends thereof. The edges of the cone do not, however,meet on one side thereof, but a space 10 is provided between them forthe escape of shavings and for the passage into said cone of thecutting'edge of a knife 14, which knife is secured in any suitablemanner to said part 9., as by screws 14,

projected through the sides of said knife into a' shoulder 9*, formed onsaid part 9. Said cone is referably apertured at the a ex, as at 10 torther facilitate the escape o dust. Upon the inner face of said cover Imount in suitable bearings, as 15, securedthereto, a slidin rod or pin15, which is normally held in retracted position by any suitable elasticor spring device, as by the spring 15". When in such retracted position,said pin is adapted to project slightly over the mouth or upper end ofsaid cone and is preferably provided at such projecting end With-abeveled head 15.

Said pin in operative position is adapted, directly or indirectly, tocause the flow of power from a suitable source to said motor and in'thereu on revolve, said knife revolving retracted position to directlyor indirectly cause the interruption of said flow. ThlS may be done inany suitable manner; but when an electric motor is used I preferablymake said pin one of the oles of the normally open circuit controllmgcontact of an electric circuit includin said motor and any suitablesource of electricity, as a battery 16, or instead of said battery anear or distant dy namo or otherwise. The other pole 15 of said normallyopen contact is preferably rigidly secured to said lid. Insulationmembers, as 15, may be inserted wherever necessary or desired. Formedin'said lid in vertical registration with the mouth of said cone is anaperture 18, adapted to permit the passage of a pencil 19 to said cone.A verticall .arranged wall or neck 18 may, if desired, e formed orerected on said lid around said aperture 18, to guide said pencil. Theback of said case is preferably provided with-a door 19 hinged to saidcase in any suitable manner, as at 19, to give easy access to the motor,and, if there be one in the casing, to the said battery. In operationthe encil to be sharpened is dipped into said nec i and thrust down intosaid cone in much the same manner that a pen is dipped. into anink-well. In its downward passage it forces the powersu ly valve intooperative position and ho s it so. The motor-shaft, head, and cone arounsaid pencil and forming a point thereon. The pencil-shavings escape fromthe cone through the space 10 and fall into said drawer or on saidshelving -partition '4, whence they drop into said drawer. Suitablestuffing-boxes (not shown) may, if desired, be inserted in or on thepartitions 3 and 4; around said shaft to prevent passage of dust tocompartments C and B, but are not considered essential.

While I have described certain forms of construction, it is obvious thatthe same may be modified or altered in many details without departingfrom the spirit and scope ofmy said invention.

Having now described my invention, what I claim, and desire to secure byLetters Patent, is

l. The combination with a rotary support of a hollowlongitudinallydivided cone mounted thereon in axial alinement therewith,one of the halves of said cone being rigidly fixed to said sup ort andthe other of said halves being pivota ly secured at its upper end tosaid su port, means adapted in o eration to hold t e lower end of thepivoted half of said cone in close relation with the lower end of theopposite side of said cone.

2. In a pencil-sharpener the combination of a longitudinally-dividedhollow cone having an elongated aperture or knife-passage formed in thewall thereof, a holder for said cone having a recess formed in one endadapted to receive the apex of said cone, said recess being greater inone transverse diameter than the portion of the cone received by it, oneside of said cone being rigidly secured to said holder, and the otherside of said cone being pivotall connected at its upper end, its lowerend eing adapted to swing away from the lower end of the op osite saldhalf, a spring adapted to keep the ower end of the pivote portion ofsaid cone 1n close relation to the lower end of the fixed portionthereof, and a knife-blade provided with a cutti 1g edge extendingthrough said knifeassago, said holder having a passage, forme thereinextending from said recess through the lower end of said holder, andsaid pivoted portion of said cone being provided with means by which itmay be swung on its pivot against the action of said s ring.

3. In a pencil-s arpener, a casing including two compartments, one ofsaid compart ments contalninga motor and the other of said compartmentscontaining -a sharpening device driven by said motor, a drawer in thesecond said compartment, the second said compartment containing aninclined or shelvin partition overhangin' the inner end of said drawerand adapts to discharge into said drawer shavings and dust escaplng fromsaid sharpening device toward the back of" said casing, substantialltyas described.

In testimony whereo I hereunto affix my signature in presence of twowitnesses.

' DELBERT D. RUSH. Witnesses: f I

Janns T. Warson, WELLINGTON M. BLEwn'r'r.

